The Receptor SIGIRR Suppresses Th17 Cell Proliferation via Inhibition of the Interleukin-1 Receptor Pathway and mTOR Kinase Activation Academic Article uri icon


MeSH Major

  • Cell Differentiation
  • Interleukin-17
  • Intracellular Signaling Peptides and Proteins
  • Protein-Serine-Threonine Kinases
  • Receptors, Interleukin-1
  • T-Lymphocytes, Helper-Inducer


  • Interleukin-1 (IL-1)-mediated signaling in T cells is essential for T helper 17 (Th17) cell differentiation. We showed here that SIGIRR, a negative regulator of IL-1 receptor and Toll-like receptor signaling, was induced during Th17 cell lineage commitment and governed Th17 cell differentiation and expansion through its inhibitory effects on IL-1 signaling. The absence of SIGIRR in T cells resulted in increased Th17 cell polarization in vivo upon myelin oligodendrocyte glycoprotein (MOG(35-55)) peptide immunization. Recombinant IL-1 promoted a marked increase in the proliferation of SIGIRR-deficient T cells under an in vitro Th17 cell-polarization condition. Importantly, we detected increased IL-1-induced phosphorylation of JNK and mTOR kinase in SIGIRR-deficient Th17 cells compared to wild-type Th17 cells. IL-1-induced proliferation was abolished in mTOR-deficient Th17 cells, indicating the essential role of mTOR activation. Our results demonstrate an important mechanism by which SIGIRR controls Th17 cell expansion and effector function through the IL-1-induced mTOR signaling pathway.

publication date

  • January 29, 2010



  • Academic Article



  • eng

PubMed Central ID

  • PMC3015141

Digital Object Identifier (DOI)

  • 10.1016/j.immuni.2009.12.003

PubMed ID

  • 20060329

Additional Document Info

start page

  • 54

end page

  • 66


  • 32


  • 1